Defense Threat Reduction Agency (DTRA), U.S.A., and the National Nuclear Center (NNC), Republic of Kazakhstan, jointly conducted a series of large chemical explosions during the summer of 1997 through 1999 at the former Semipalatinsk Test Site [STS] in Eastern Kazakhstan. These experiments were carried out primarily as part of the closing of unused tunnels and shafts at the STS under the Co-operative Threat Reduction Program as regulated in the Nunn-Lugar Bill. These explosions provide an excellent opportunity to test the readiness of some national and international seismic monitoring infrastructure. They also offer a valuable suite of GTO data for calibrating regional seismographs in the Central Asia with a variety of possible immediate application: improved mapping of seismicity for earthquake hazard reduction, fundamental research in seismology, and nuclear treaty identification. Phase arrival picks of these chemical explosions have been measured off digital waveforms recorded at the Kazakhstan Broadband Network (KZNet), Kyrgiz Network (KNet), Talgar Complex Seismological Expedition [TCSE], and Altai-Sayan Experimental & Methodological Seismological Expedition [ASEMSE].